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CHARLES L.. KINGSLEY, OF MERIDEN, CONNECTICUT, ASSIGNOR TO CHARLESPARKER, OF THE SAME PLACE.

Letters Patent No. 71,498, dated November 26, 1867..

e IMPROVEMENT IN BENCH-VISES..

To ALL WHOM'IT MAY coNeERN:

Be it known that I, CHARLES L. KINGSLEY, of Meriden,4 in the county ofNew Haven, and State of Con` e necticut, have invented an Improvement inBench-vises; and -I do hereby declare `the following, whentaken inconnection with the accompanying drawings, and the 4letters of referencemarked thereon, to bea full, clear,

and exact description of the same, and which said drawings constitutepa'rt of this specification, and reprep sent, in-' Figure 1, a sideview. Figure 2,' an end view; and in Figure 3, a longitudinal section. Vp V This invention relates to an improvement in what is known as tli'eParker vise, which isa'vise` having` the movable jaw attached to ahorizontal slide, but is alike applicable to other parallel vises orsuch other vises as withdraw the movable jaw by means of the screw, andconsists in the peculiar device for causing the return of the screw towithdraw the jaw. I-Ieretefore various devices have been resorted to forthis purpose, but in all .cases there is no arrangement for compensatingor taking up the wear occasioned by the continual turning of' the screw,so that the screw must be turned to a greater or less extent before ithas any effect upon the jaw.

By my invention this difficulty is overcome.

To enable others to construct my improvement, I will proceed to describethe saine as illustrated in the. accompanying drawings.

A is the hollow shank through which the screw passes; B, the jaw fixedto or made,a part of the bar A, in

the usual manner. The jaw is formed-with aprojection, C, in front, andto this projection C is xed a plate,

D, by means of a screw, as denoted in the drawings. The said plate D hasa channel, as seen in iig. 3, formed in its under or inside,corresponding to the collar on the screw, so that when placed over thescrew, the collar working in the said channel moves the jaw out aiid inin the usual manner. Between the said plate and the bar A, a space, d,is left, (see iig. 3,) so that. when the channel o'r collar on the screwshall have become so worn.

as to make the collar loose in the channel, then remove the plate fromthe projection and cutaway from the face of the projection or fromtheplatc suflicientto tighten the plate, and replace the plate, and thescrew again works in a perfect manner, or, if' preferred, in theconstruction of the vise, thin plates may be placed between' the plate Dand the face of ythe projection C, so that `one or more of the platesmay be removed to compensato i for the wear of the'collar.A i

I dol not broadly claim forming a channel at the front end of the bartocause the screw to move the jaw; but what I do claim as new and useful,and desire to secure by Letters Patent, is-

The plate' D, constructed with the channels, as described, and arrangeduponthe projection on the jaw B, i

so as to be adjusted thereon in the manner specified- CHAS. L. KINGSLEY.

i Witnesses:

JOHN W. MILES, ALMEsoN MILES.

